.gitignore - add phpunit.xml file
phpunit.xml.dist - change whitelist filter and add logging
PropertyTrait - Fixture and Test classes
PropertyTrait, StaticPropertyTrait - hasOne now with array_key_exists instead of isset
PropertyTrait, StaticPropertyTrait - add removeAll method
PropertyTrait::removeAll - add test case
StaticPropertyTrait - add unit tests
PropertyTrait, StaticPropertyTrait - simplify remove method
PropertyTrait, StaticPropertyTrait - change some variable names
phpunit.xml.dist - change logger coverage settings